Features: Solid brass,gold-plated for corrosion resistance. The cover is made of high strength, nonperishable industrial-grade plastic. Applicable to auto, boat or other vehicles, protect your audio system. Crystal clear cover, heat resistant base and compact space saving design, fast and easy installation. Circuit Protection: Builtin low melting point material fuse, when the current value exceeds the fuse fusing value during short circuit, the fuse in the fuse will be blown immediately. Specifications: Material:Zinc Alloy Size : Approx.7.4x4.4x2.9cm/2.91x1.73x1.14inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 x Car Power Distributor Block